emsfactory
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| posted on 29/1/07 at 07:36 PM |
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Burned cerbera GRP help
Hi chaps.
A friend of mines cerbera caught fire recently. Fuel line busrt onto the manifold apparently.
Th repairing company says it just needs some wires and hoses replaced but the body work is fine. He has asked me to go with him to look over the
panels to make sure.
I am OK at making stuff from fiberglass but have never looked at damaged stuff. Any pointers?
I know that over heated GRP will sag. I have
got some very hot myself and the gel gets soft, but this car will have been painted.
I thought Id look for sagging, warping soft areas and blisters. Obviously scorched stuff will be clearly visible.
I asume it will have been made using pre preg. What temps will this handle?
Cheers.
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BenB
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| posted on 29/1/07 at 07:42 PM |
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Low-temp pre preg CF gets cured in the oven @ 100degC..... and the limiting factor there is the resin.... so it can handle at least that (though you
may get sagging as you mention)....
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rav
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| posted on 29/1/07 at 08:02 PM |
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Sice resins are normally thermosetting, wouldn't the GRP just burn, blister or delaminate? Could the resin soften again?
Old TVR's were wet lay up I think, not sure if they've changed that
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ed_crouch
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| posted on 29/1/07 at 08:27 PM |
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My Wedge is wet layup, and Im pretty sure they still are (were...)
Ed.
I-iii-iii-iii-ts ME!
Hurrah.
www.wings-and-wheels.net
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Hammerhead
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| posted on 29/1/07 at 09:16 PM |
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I think you need to establish if the car is made from grp or cf. I have heard of prepreg cf but never prepreg grp. Then i suppose you need to
establish if prepregs properties differ from wet layup.
The resin would probably just burn rather than actually melt under heat. imo of course.
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speed8
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| posted on 29/1/07 at 09:57 PM |
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quote:
Originally posted by emsfactory
A friend of mines cerbera caught fire recently. Fuel line busrt onto the manifold apparently.
Is your friend on Pistonheads?
I only ask because there has been 2 or 3 cerbs on there that have went up in flames recently. Same type of thing with a burst fuel line somewhere as
far as the owners can figure out.
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SeaBass
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| posted on 29/1/07 at 10:25 PM |
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Just watch out for hydroflouric acid which can be produced during engine fires if rubber and plastics get hot enough... by the time you feel it hurt
it's done serious damage to your nervous sytem... Ouch
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emsfactory
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| posted on 29/1/07 at 10:56 PM |
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I thought tvr got their matting in refrigerated vans. Thought they were fiberglass so assumed it was prepreg. May be wrong on that though.
Yeh, when I meant soft I didn't mean reacting backwards, more the start of a blister.
Dont know if he's on pistonheads. I'll ask. I'm sure it wont make him feel any better though. 
Thanks for reminding me about the hydrofloric. Forgot about that.
I'll just play it by ear. I'm sure if anything is wrong it will be visable.
The garage are giving him a 5 year warranty for the checked parts so if it buggers up later he should be covered.
I'l let you know how it goes.
Cheers chaps.
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